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简介：EffectofaddedCo2+(aq)oncopperelectrowinningwasstudiedusingdopedpolyaniline(Pani)andPb-Ag(1%)anodesandastainlesssteelcathode.ThepresenceofaddedCo2+(aq)intheelectrolytesolutionwasfoundtodecreasetheanodepotentials.TheoptimumlevelofCo2+(aq)concentrationintheelectrolyte,withrespecttothemaximumsavingofpowerconsumptionwasestablished.Linearsweepvoltammetry(LSV)wasusedtostudytheinfluenceofaddedCo2+(aq)ontheanodicprocessesinacoppersulfate-sulfuricacidelectrolyte.Theoxygen-evolutionpotentialforPanianodeisdepolarisedatlowercurrentdensities(≤0.01A/cm2)andattainssaturationatρ(Co2+)o≈0.789g/L;whilsttheoxygen-evolutionpotentialforPb-Ag(1%)anodeisdepolarisedathighercurrentdensities(≤0.02A/cm2)andattainssaturationatρ(Co2+)o≈1.315g/L.Thepreferredorientationsofthecopperdepositschangefrom(220)to(111)withtheadditionof0.394?0.789g/LCo2+buthigherconcentrationsfavor(220)orientationagain.

简介：PalmSource公司于去年年底宣布向许可商提供PalmOSCobalt,PalmOSCobalt就是大家所谈论的PalmOS6操作系统。那么PalmOS6到底有什么新的特性？到底是何方神圣？能不能在争夺日益激烈的掌上设备操作系统中取得优势？在大家对PalmOSCobalt盼望、猜测和充满疑问的时候，《数码·移动通讯》整理了一些读者们最感觉兴趣问题，通过越洋电话对PalmSource公司PalmOSCobalt产品经理JohnCook先生进行了独家专访，以下就是此次越洋电话专访的内容。

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简介：为从氯化铜溶液再循环铜的方法被开发。这个过程由铜，纯化和粒子尺寸减小的抽取组成。在第一步，减少的金属碎片被加到废物迷住的酸的氯化铜在聚氯联苯工业生产了获得铜粉。作文分析证明这粉末包含了象Fe，Ni，和水那样的杂质。那么，弄干并且纯化被使用微波和一个离心分离器执行。从而，铜粉有纯净比99%高、球形在形态学的形式。铜粉尺寸被球milling减少。

简介：ＣｏｐｐｅｒｄｅｐｏｓｉｔｉｓｏｎｅｏｆｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔａｎｄｗｉｄｅｓｐｒｅａｄｏｒｅｓｉｎＣｈｉｎａ．ＴｈｅｃｏｐｐｅｒｍｅｔａｌｏｇｅｎｙｉｎＣｈｉｎａｒｅｖｅａｌｓａｃｏｍｐｌｉｃａｔｅｄｔｅｃｔｏｎｉｃｅｖｏｌｕｔｉｏｎｈｉ...

简介：Thecrystalstructureofthetitlecomplex{[Co(TCB)2/2-(IMI)2(H2O)2][Co(IMI)4(H2O)2]}(H2O)4(whereTCB=1,2,4,5-benzenetetracarboxylicanion;IMI=imidazole)hasbeendeterminedbyX-raydiffractionmethod.Crystaldatafor{[Co(TCB)2/2(IMI)2(H2O)2][Co(IMI)4(H2O)2]}-(H2O)4:triclinic,spacegroupP1,a=1.0647(2)nm,b=1.1165(1)nm,c=1.00361(1)nm,α=91.56(1)°,β=111.34(1)°,γ=115.642(10)°,V=0.9772(3)nm5,Z=1.Thepolymercobalt(II)complexhasanovelthree-dimensionnetworkstructure.Co(1)atomandCo(2)atombotharecoordinatedinanoctahedralarrangementandlocatedinthecenterofthecoordinationanionandthecenterofthecoordinationcation,respectively.MoreoverfourcarboxylgroupsofTCBaredividedintotwotypes,twopara-carboxylgroupsbridgeCo(1)atominmonodentatefashionandothertwopara-carboxylgroupsareinfree.

简介：ＣｈｉｎａＤｅｖｅｌｏｐｓＣｏｐｐｅｒＢｅａｄｓＩＵＤＡｎｅｗｔｙｐｅｏｆｉｎｔｒａ－ｕｔｅｒｉｎｅｄｅｖｉｃｅ（ＩＵＤ），ＣｏｐｐｅｒＢｅａｄｓＩＵＤ，ｈａｓｂｅｅｎｄｅｖｅｌｏｐｅｄｒｅｃｅｎｔｌｙｉｎＣｈｉｎａ．Ｉｔｈａｓｂｅｅｎａｐｐｒｏｖｅ...

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简介：IntroductionInAnatolia,thebirthandthedevelopmentofmetallurgyintervenedbetweenthe9thand3rdmillenniumsaswellastestifythemoreandmorefrequentapparitionsofmetalsartefactsintheinventoryofthearcheologicalobjectsofthisperiod.

简介：ＳｔｕｄｉｅｓｏｎＥｌｅｃｔｒｏｌｙｔｉｃＣｏｄｅｐｏｓｉｔｉｏｎｏｆＬａｎｔｈａｎｕｍ－ＣｏｂａｌｔｉｎＵｒｅａＭｅｌｔＱｉｕＫａｉｒｏｎｇ（丘开容），ＹａｎｇＱｉｑｉｎ（杨绮琴）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｏｎｇｓｈａｎＵｎ...

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简介：Thesixmultiimidazolecopper(Ⅰ)complexesareutilizedtomimictyrosinase.Themainproductis3,5-di-t-butylcatecholfromo-hydroxylationofthesubstrate2,4-di-t-butylphenol.Thehighestyieldofcatecholisupto82.2%andselectivity94.8%by[Cu(I)_(3b)(MeCN)_2](ClO_4)_2andO_2undermildconditions,whicharefoundtobemoreefficientthanthatalreadyreported.

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简介：Thisresearchreportsthepreparationandcharacterizationofcoppernanoparticlesmodifiedbydidecylbenzenesulfonate(DBS),TheCunanoparticles'sizewasdeterminedtobe40nmbytransmissionelectronmicroscope(TEM).TheX-rayphotoelectronspectrometry(XPS)resultsshowthatthereareinteractionsbetweenthecoppernanoparticlesandDBSfunctiongroup.Thenonlinearopticalpropertieswerestudiedbythefour-wavemixingmethod.Thevalueofx^(3)/α0wasfoundtobe6.9×10^-11esucm.

简介：Theso-called“Yangtze-type”copperdepositsinclude:（1）Cu-bearingmassivepyritebed,(2)Cu-bearingskarnandmagnetite-typeoredeposits,withreplacementCu-vein-typedepositsnearthemetasomaticzone,and(3)mineralizedintrusivebodiesandbrecciapipes,someofwhichareknownasporphyrycopperores(e.g.Chengmenshan).ThistypeoforedepositsisatypicalexampletoverifythepolygenesisofinostofthedepositsinChina,ashasbeenpromotedbyProf.TuGuangchiinviewofthepolycyclicdevelopmentofthegeologicalhistoryinChina.Thispaperiscon-cemedwithonesub-typeofsuchdeposits.

简介：Theuseofmoreandmoreelectronproductsrequiresinteriorwoodproductstohavetheperformanceofelectromagneticshielding.Oneofthewaystorealizeitistointroducethechemicalplatingwhichhasalreadybeendevelopedinelectronindustryintowoodprocessing.Thepaperclarifiesthemechanismofelectrolesscopperandgoldplatinganditsapplicationtowood.Itemphasizesthedevelopmentandtechnologyofelectrolesscopperandgoldplatingonwood.Meanwhile,itpointsoutthatitishighlyfeasibletotakethistechnologyintoeffect.

简介：HydrolysisofDNAisanimportantenzymaticreaction,butitisexceedinglydifficulttomimicinthelaboratorybecauseofthestabilityofhydrolysisofDNA.Inthispaper,thecleavageactivityofcomplexesformedbetweenCu(Ⅱ)andfourdifferentaminoacidoraminoacidmethylesteronDNAisstudiedbygelelec-trophoresis.ItisfoundthatDNAcouldbecleavedbyCu(Ⅱ)-L-HisandCu(Ⅱ)-L-Hismethylestercomplexesandtheefficiencyofcleavageislargelydependentonthemetalion-to-ligandratio.FurtherexperimentsshowthatthecleavageofDNAmediatedbyCu(Ⅱ)-L-HiscomplexesoccursviaahydrolyticmechanismandtheactivechemicalspeciesthataffectsDNAcleavageisproposedtobeMI2H+andML2H22+.

简介：AccordingtoAWPAE11-2006standard,copperfixationratesofseveralcopper-basedformulations,suchasammoniacalcopper,aminecopper,andammoniacal-ethanolaminecopper,aswellasalkalinecopperquaternary(ACQ),weretestedandcomparedinthispaper.Andthefixationratesoftebuconazole(TEB)andpropiconazole(PPZ)inseveralformulations,suchascopperazole,emulsifiedtypeandsolventtype,werealsocompared.Thedeterminationofcoppercontentintheleachatewasanalyzedbyatomicabsorptionspectrom...

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